At $1.7 billion, Nook is worth more than Barnes & Noble itself

Microsoft and Barnes & Noble have buried the patent hatchet and teamed up to compete against Apple and Amazon in the eBooks business. The new partnership sees Microsoft investing $300 million in a new Barnes & Noble subsidiary. (My colleague Laura Owen has the complete breakdown of the deal over on paidContent.)

The $300 million investment in the Nook subsidiary of Barnes & Noble gives Microsoft about 17.6 percent ownership of this business unit. That values this part of the business at about $1.7 billion. Before the markets opened this morning, the Nook business was valued about $900 million more than Barnes & Noble itself.

Update: Barnes & Noble stock zoomed at the opening bell – and is now trading at about $9 a share, giving Barnes and Noble a total market cap of $1.3 billion, which is still less than the Nook subsidiary itself.